On the
2011 off the Pacific Coast of Tohoku Earthquake, gymnasium buildings exhibited
the unexpected structural damages, which prevented a use as evacuation shelters
in during- and post-disaster periods. The major failure occurring on the connection between the RC column top and steel roof as well as
the cracks in the RC column base was observed
during the emergent inspection. According to the earlier studies, it was
implied that the presence of the slotted hole possibly deteriorates the seismic
capacity; however, the length of slotted hole was fixed at a certain value.
Facing this concern, this research attempts to clarify the influence of the
slotted hole length through a comprehensive parametric study by pushover and
seismic response analyses. In conclusion, it has been discovered that the
slotted hole deteriorates the seismic capacity for the connection failure up to
almost 50% of that without slotted hole. Moreover, the discrepancy of
characteristics obtained by the static and dynamic analyses is originated by
means of the presence of slotted hole. This slotted hole effect should be noted
by structural engineers and researchers to provide the adequate seismic
diagnosis and strengthening.
References
[1]
[1] Joint Editorial Committee for the Report on the Great East Japan Earthquake Disaster (2014) Report on the Great East Japan Earthquake Disaster-Building Series Volume 3 Structural Damage to Steel Buildings and Structural Damage to Shell and Spatial Structures. Architectural Institute of Japan. (In Japanese)
[2]
Japan Organization of Advancing Construction Technology (2015) Guideline of Seismic Diagnosis and Strengthening of RC Frame with Steel Roof. Gihodo Shuppan Co. Ltd., Tokyo. (In Japanese)
[3]
Inaba, Y., et al. (2018) Cyclic Loading Tests on Steel Roof Bearings and Effects on Roof Responses. Journal of Structural and Construction Engineering (Transactions of AIJ), 83, 1129-1137. (In Japanese) https://doi.org/10.3130/aijs.83.1129
[4]
Ito, K., Yamashita, T. and Watanabe, S. (2019) Cyclic Shear Loading Test and Strength Evaluation on Roof Bearings. Journal of Structural and Construction Engineering (Transactions of AIJ), 84, 649-657. (In Japanese)
https://doi.org/10.3130/aijs.84.649
[5]
Yamashita, T. and Wada, N. (2019) Study on Stability in Sliding of Bearings Supporting Large-Span Steel Roofs. Journal of Structural and Construction Engineering (Transactions of AIJ), 84, 1251-1258. (In Japanese)
https://doi.org/10.3130/aijs.84.1251
[6]
Shimada, Y., et al. (2020) Method of Reinforcement for Joints between Steel Roofs and RC Columns in Existing Buildings. Engineering Structures, 209, Article ID: 110255. https://doi.org/10.1016/j.engstruct.2020.110255
[7]
Narita, K., Takeuchi, T. and Matsui, R. (2013) Seismic Performance of School Gymnasia with Steel Roofs Supported by Cantilevered RC Wall Frames. Journal of Structural and Construction Engineering (Transactions of AIJ), 78, 1895-1904. (In Japanese) https://doi.org/10.3130/aijs.78.1895
[8]
Terazawa, Y., et al. (2015) Damage Control of Composite Gymnasium Structures with Energy-Dissipation Roof Bearings. Eighth International Conference on Behavior of Steel Structures in Seismic Areas, Shanghai, 1 June 2015, Paper ID 52.
[9]
Kimura, T., Ohsaki, M. and Sato, K. (2020) Structural Optimization of Supporting Structure of School Gymnasium with Steel Roof for Seismic Response Reduction of Bearing Reaction Forces. Journal of Structural and Construction Engineering (Transactions of AIJ), 85, 61-71. (In Japanese) https://doi.org/10.3130/aijs.85.61
[10]
Watanabe, S. and Yamashita, T. (2020) Earthquake Response Analysis of Steel Roof Gymnasiums Considering Nonlinear Restoring Force Characteristics of Lower Structure and Roof Bearings. Journal of Structural and Construction Engineering (Transactions of AIJ), 85, 209-218. (In Japanese) https://doi.org/10.3130/aijs.85.209
[11]
Fujita, T., et al. (2014) Damage Investigation and Analysis of Damage Mechanism on Spatial Structure Consisted of Steel Roof and RC Substructure. Proceedings of JCI Annual Conference, 36, 1297-1302. (In Japanese)
[12]
Fujita, T., Suzuki, A. and Kimura, Y. (2014) Static Elasto-Plastic Analysis for Damage Mechanism of Gymnasium Structured RC Frame with Steel Roof Structure. Proceedings of Constructional Steel, 22, 447-452. (In Japanese)
[13]
Suzuki, A., Fujita, T. and Kimura, Y. (2016) Damage Mechanism of Gymnasium Building with RC Frame and Steel Roof Damaged by the 2011 Tohoku Earthquake. Journal of Steel Construction, 23, 17-29. (In Japanese)
https://doi.org/10.11273/jssc.23.91_17
Kato, H., et al. (2010) Tensile Test and Shear Test of Improved Type of Reinforced Anchor-Bolts—A Study on Improving Plastic Deformation Capacity of Anchor-Bolts in Exposed Column Bases of Existing Steel Buildings Part 2. Journal of Structural and Construction Engineering (Transactions of AIJ), 655, 1709-1716. (In Japanese) https://doi.org/10.3130/aijs.75.1709
[16]
Architectural Institute of Japan (2012) Recommendation for Design of Connections in Steel Structures. Maruzen Publishing Co. Ltd., Tokyo. (In Japanese)
[17]
Architectural Institute of Japan (2015) Recommendations for Loads on Buildings. Maruzen Publishing Co. Ltd., Tokyo. (In Japanese)
